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Multi-Objective Optimization of 12-Pole Radial Active Magnetic Bearings with Preference-Based MOEA/D Algorithm

Author

Listed:
  • Xueqing Li

    (School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

  • Xiaoyuan Wang

    (School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

  • Haoyu Shen

    (School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China)

Abstract

In this paper, the multi-objective optimization of the 12-pole radial active magnetic bearing (RAMB) is investigated. In the optimization of the RAMB, the decision-maker is more interested in the Pareto-optimal solutions in a certain region. This paper proposes a decomposition-based and preference-based multi-objective evolutionary algorithm (MOEA/D-Pref). The proposed MOEA/D-Pref not only allows the number of Pareto-optimal solutions to be more concentrated in the region of interest but also preserves solutions in other regions. These preserved solutions enable decision-makers to observe a more complete Pareto front, thus gaining more comprehensive insights. In this paper, a mathematical model of the 12-pole RAMB is established, and, with the help of this model and the proposed algorithm, the optimal design of the 12-pole RAMB is completed. The difference between the current stiffness coefficients of the optimized RAMB, calculated by the proposed algorithm and by the finite element method, is 2.3%. The difference between the displacement stiffness coefficient of the optimized RAMB as calculated by the proposed algorithm and by the finite element method is 3.9%. These differences, being less than 4%, are relatively low and verify the reliability of the mathematical model established.

Suggested Citation

  • Xueqing Li & Xiaoyuan Wang & Haoyu Shen, 2025. "Multi-Objective Optimization of 12-Pole Radial Active Magnetic Bearings with Preference-Based MOEA/D Algorithm," Energies, MDPI, vol. 18(16), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:16:p:4299-:d:1723152
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    References listed on IDEAS

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    1. Molina, Julin & Santana, Luis V. & Hernandez-Daz, Alfredo G. & Coello Coello, Carlos A. & Caballero, Rafael, 2009. "g-dominance: Reference point based dominance for multiobjective metaheuristics," European Journal of Operational Research, Elsevier, vol. 197(2), pages 685-692, September.
    2. Rui Zhang & Xinying Song & Zongze Cui & Wei Hao & Cong Xu & Liwei Song, 2023. "Distributed Modeling of Isolated Active Magnetic Bearings Considering Magnetic Leakage and Material Nonlinearity," Energies, MDPI, vol. 16(24), pages 1-18, December.
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